Split pulley



(No Model.)

J. B. HICKS 8u P. C. BROOKSBANK.

SPLIT PULLBY. No. 385,712. Patented July l0, 1888.

n4 PETERS, Phmwuzhognpher, wmnngum, n. c

linie Sratrns 'Panter trice,

JOHN B. HCKS AND FREDERICK CLEMENT BROOKSBANK, OF CLEVELAND, OHIO.

SPLlT PULLll-IY.

SPECIFICATION forming part of Letters Patent No. 385,712, dated July 10, 1.888.

(No model.)

.To all whom t may concern.-

Be it known that we, JOHN P. HICKS and FREDERICK CLEMENT BRooKsBANK, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and Slate ot Ohio, have invented certain new and useful luiprovementsin Split Pulleys; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to split pulleys, and has for its object to produce a pulley in which the weight is reduced to the minimum consistent with strength and durability, and which can be iliade at a great saving in cost of material and labor as compared with other pulleys 1n common use.

To this end the invention consists in a split pulley having a hub with armsockets substantially on the line of its division and hollow arms screw-threaded at their ends to connect with the hub and band, respectively, all as shown and described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of the specification, Figure l is a side elevation, partly in section, ot'ourimproved pulley, a transverse section of the hub at its center being taken to show the means oi' securing the arms therein7 and further section lines disclosing the formation of the hollow arms and the socket-plates by which they are attached to the band. Fig.2 is a plan view ot' the pulley with part of the band and the arms broken away to give a view of the hub. Fig. 3 is an inside view of one of the duplicate sections of the hub.

The hub of our improved pulley consists of two sections, A A, which are exact duplicates of one another and have flanges or ears a a upon their respective sides, through which they are bolted together and made practically as solid asili' they were originally formed in a single piece. ln the sections ot' the hub thus made are cast as many arm-sockets as may be requiredsay, as a usual thing, three to each section, or six all told. These sockets are disA posed around the center of the hub equidistant apart. AThis arrangement ofcourse brings two sockets on opposite sides directly in the line of division or split between the sections of the hub. To provide for this arrangement, we cast a full socket, a, on each section, which forms an outward projection equal to, say, halt 55 the width of the socket, and with sufficient metal to give it thc necessary 'strength and firmness, so that an arm set into such a socket is of equal service to those disposed in the other parts of the hub. Then, to accommodate 6o the projection of the socket a and not have it interfere with clamping the two sections closely together, we make a corresponding` circular cavity, u, in the opposite section. This construction enables us to employ only the same 65 number of arms and in the saine relation and arrangement as would be employed if the hub were cast or made in a single piece with armsockets disposed closely about its center.

B represents the arms of the hub, which 7o consist merely of sections of any suitablysized pipe, as gaspipe, cut into the necessary lengths and provided with right and left screwthreads at their opposite ends.

' O are the T-shaped socket-plates, through 75 which the band D and the arms are united. These socket-plates are cast in the form shown, so that they require no truing upon the back to adapt them to the curvature of the band, and are threaded in the usual way. The band 8o is preferably formed in two pieces bent to the desired size and united at the ends by means of the socketplates. The arms being inserted, as shown, and the band properly set up, it may be trued upon its periphery and S5, brought to describe a perfect circle by turning the arms for that purpose, a turn in one direction tending to contract the band toward the center from the quarter of that par ticulararm,andturningitintheopposite direc- 9o tion expanding the band. The peculiar construction of the hub with its screw-sockets complete in the respective sections, and nrranged as shown, enables ns to use removable and independent arms of only the same nnin- 95 ber that would be used it' the hub were in one piece, and which would be impraeticable if the hub sections had not the intermediate complete soekets. With these sockets formed as herein shown and described the advantages of Ico individually-adjestable armsis combined with the advantages ofasplitpulley-a result never to our knowledge attained before and possessing evident novelty and value. It will also be seen that in a pulley thus fashioned the original labor in making the several parts is greatly simplified, and the cost of material, both as respects quantity and style, is materially reduced. This latter difference is seen by comparing our pulley with a'cast-iron pulley ofthe same size, ours weighing only twenty-fourponnds against about sixty-live pounds in the cast-iron pulley. Again, the method of making the cast-iron pulley necessarily involves molding on a large scale and considerable skilled hand-labor to finish it for use, while the moldings in our pulley are very small, and the labor of preparing the parts and setting it up is easily and quickly donein any ordinary shop. This pulley has the additional advantage of lightness in handling, so

. that one person can take it and easily place it upon a shaft without help.

The interior of the hub may be constructed 'in any desirable way as to its bearings, and

screws e are shown as projecting through from the outside to fasten it upon the shaft. Of course other means of fastening might be adopted and other changes be made in the structure here shown without departing from the spirit of our invention.

rlhe manner herein described of constructing the pulley enables us to use, for example, either Wrought metal or steel in making the band, the T-sockets, and arms,wl1ich is a great advantage in the cost and labor of manufacture.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In a split pulley, a hub divided into two separate sections in' the line of its axis, and having armsockets on the line of division between said sections, substantially as set forth.

2. In a split pulley, a hub formed in two sections and each having an arm socket on the line upon which the sections meet, and cavif ties at one edge to accommodate the said sockets, substantially as set forth.

3. In a split pulley, a hub split longitudinally in sections and provided with screwthreaded sockets on the line of the split, 1n combination with screw-threaded arms and a band, substantially as set forth.

4. In a split pulley, a hub formed in two equal sections split in the line of its axis and having arm-sockets on the line dividing the sections, formed wholly in one section. whereby each socket is made complete in itself, in com bination with a metal band and right and lel't hand screw-threaded hollow arms uniting the band and hub, substantially as set forth.

5. In a split pulley, a hub formed in duplicate sections A A', having projecting sockets a" on the meeting faces ot' the sections and curved cavities a iu said meeting faces, in combination with metallic band D, T-shaped sockets C, and hollow arms B, screw-threaded and set in the sockets on the baud and in they hub, for thc purpose set forth.

JOHN ll. HICKS. FREDERICK CLEMENT BROOKSBANK.

ritnessesz H. T. FIsHER, I. L. CoRnY. 

